.media img {
  width: 300px;
  height: 300px;
}

p {
  font-size: 60px;
  color: red
}  * {
  margin: 0;
  padding: 0;
}

ul,
ol,
li {
  list-style: none;
}

img {
  display: block;
  width: 100%;
  height: 100%;
}

.box {
  width: 900px;
  display: flex;
  flex-direction: column;
  position: relative;
  margin: 50px auto;
}

.media-left {
  position: relative;
}

.mask {
  width: 200px;
  height: 200px;
  background: yellow;
  opacity: 0.4;
  position: absolute;
  top: 0;
  left: 0;
  display: none;
}
.glass {
  width: 600px;
  height: 600px;
  position: absolute;
  left: 700px;
  top: 120px;
  background-repeat: no-repeat;
  background-position: 0 0;
  background-size: 1200px 1200px;
  display: none;
}